[llvm] [RISCV][GISEL] instruction-select for G_SPLAT_VECTOR (PR #111193)

[Michael Maitland via llvm-commits]

michaelmaitland wrote:

Where did the discussion on this end up? Should we take this patch so we get selection working and revisit the approach / discuss in the future?

https://github.com/llvm/llvm-project/pull/111193